A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6806592 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 18 24 26 27 32 36 39 48 52 54 64 72 78 81 96 101 104 108 117 144 156 162 192 202 208 216 234 288 303 312 324 351 404 416 432 468 576 606 624 648 702 808 832 864 909 936 1,053 1,212 1,248 1,296 1,313 1,404 1,616 1,728 1,818 1,872 2,106 2,424 2,496 2,592 2,626 2,727 2,808 3,232 3,636 3,744 3,939 4,212 4,848 5,184 5,252 5,454 5,616 6,464 7,272 7,488 7,878 8,181 8,424 9,696 10,504 10,908 11,232 11,817 14,544 15,756 16,362 16,848 19,392 21,008 21,816 22,464 23,634 29,088 31,512 32,724 33,696 35,451 42,016 43,632 47,268 58,176 63,024 65,448 67,392 70,902 84,032 87,264 94,536 106,353 126,048 130,896 141,804 174,528 189,072 212,706 252,096 261,792 283,608 378,144 425,412 523,584 567,216 756,288 850,824 1,134,432 1,701,648 2,268,864 3,403,296 and 6,806,592, with no remainder.
Since 6,806,592 cannot be divided by just 1 and 6,806,592, it is not a prime number.